//-----------------------------------------------------------
public Type VisitFirst(Subroutine node)
{
var subrName = node[0].AnchorToken.Lexeme;
GlobalTable.Add(subrName, new SymbolTable());
currentProgUnit = subrName;
var subrTable = GlobalTable[currentProgUnit];
foreach (var arg in node[1])
{
var argName = arg.AnchorToken.Lexeme;
subrTable[argName] = new FunctionSymbolEntry(Type.NONE, true);
}
VisitFirst((DeclarationList)node[2]);
return(Type.VOID);
}
//-----------------------------------------------------------
public Type VisitFirst(Function node)
{
var funcType = node[0];
var funcName = node[1].AnchorToken.Lexeme;
GlobalTable.Add(funcName, new SymbolTable());
currentProgUnit = funcName;
var funcTable = GlobalTable[currentProgUnit];
foreach (var arg in node[2])
{
var argName = arg.AnchorToken.Lexeme;
funcTable[argName] = new FunctionSymbolEntry(Type.NONE, true);
}
VisitFirst((DeclarationList)node[3]);
return(typeMapper[funcType.AnchorToken.Category]);
}
//-----------------------------------------------------------
public Type VisitFirst(Declaration node)
{
var funcTable = GlobalTable[currentProgUnit];
foreach (var decl in node)
{
var variableName = decl.AnchorToken.Lexeme;
if (!funcTable.Contains(variableName))
{
funcTable[variableName] =
new FunctionSymbolEntry(
typeMapper[node.AnchorToken.Category]);
}
else
{
funcTable[variableName].SymbolType =
typeMapper[node.AnchorToken.Category];
}
if (decl.HasChildren())
{
var declArray = decl[0];
if (declArray.NodeChildrenCount() > 2)
{
throw new SemanticError(
"An array can have 2 dimensions at most: "
+ variableName,
decl.AnchorToken);
}
for (int i = 0; i < declArray.NodeChildrenCount(); i++)
{
funcTable[variableName].Params
.Add(declArray[i].AnchorToken.Lexeme);
}
}
}
return(Type.VOID);
}
